If you have ever hunted with lead, you will remember the people used 6's for ducks, and 2+4's for geese. Rarely would people ever use BB's for geese with lead because you just didn't have to. Same goes for Heavy shot. Lot's of energy, plus the smaller shot size creates a denser pattern. All my dad shoots is 2 3/4 (sometimes 3") #6 Bismuth or Heavy shot. Whack's geese like my 3 1/2" #2 or BB steel. Wish I had the money to use it.